• 熟悉电子商务的概念模型 • 理解电子商务的一般框架 • 熟悉电子商务的主要参与者 • 理解电子商务的功能与效益 • 掌握电子商务的分类 • 掌握电子商务的商业模式 及其特点

1．1 商务与商务活动 1．2 传统商务活动演变及其局限性 1．3 信息技术的发展与商务电子化 1．4 WWW与电子商务的产生！

一、功率晶体管GTR 二、功率功效应晶体管（P-MOSFET） 三、绝缘栅双极型晶体管（IGBT） 四、自关断器件驱动电路

§２-１ 单相半波可控整流电路 §２-２ 单相桥式全控整流电路 §２-３三相半波可控整流电路 §２-４三相桥式全控整流电路 §2-5 换流重叠现象

1 Introduction 2 Deterministic Dynamic Programming and Viscosity Solutions 2.1 Introduction 2.2 Value Functions are Viscosity Solutions 2.3 Comparison and Uniqueness 3 Stochastic Control 3.1 Some Probability Theory 3.2 Controlled State Space Models 3.3 Filtering 3.4 Dynamic Programming - Case I : Complete State Information 3.5 Dynamic Programming - Case II : Partial State Information 3.6 Two Continuous Time Problems 4 Robust Control 4.1 Introduction and Background 4.2 The Standard Problem of H∞ Control 4.3 The Solution for Linear Systems 4.4 Risk-Sensitive Stochastic Control and Robustness 5 Optimal Feedback Control of Quantum Systems 5.1 Preliminaries 5.2 The Feedback Control Problem 5.3 Conditional Dynamics 5.4 Optimal Control 5.5 Appendix: Formulas for the Two-State System with Feedback Example 6 Optimal Risk-Sensitive Feedback Control of Quantum Systems 6.1 System Model

一、主电路形式选用 二、整流变压器设计计算 三、整流元件选择 四、主电路元件保护 五、电抗器设计

3.1 Introduction 3.2 Typical test signals for time response of control systems 3.3 First –Order Systems 3.4 Performance of a Second-Order System 3.5 Concept of Stability 3.6 The Relative Stability of Feedback Control Systems

学习要点： • 555定时器的工作原理及逻辑功能 •由555定时器构成单稳、多谐、施密特触 发器的方法

§6—1、基本概念 §6—2、负载谐振式逆变器 §6—3、强迫换流式逆变器 §6—4、逆变器的多重化技术 §6—5、PWM逆变器 §6—6、交——交变频电路

Frequency response is the analysis of the response of systemswhen subjected to a sinusoidal change in input. When a linear system is subjected to a sinusoidal input, its ultimate response is also a sustained sinusoidal wave, with the same frequency. The figure below compares the output response of a system (solid line) with a sinusoidal input (dashed line) disturbing the system